Re: 32 bit and 64 bit freebsd binary compatiblty
Can anyone tell how do we handle this situation??? Is there any way or i have to compile my code on 64 bit machine?? what's a problem to compile on 64-bit machine? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 32 bit and 64 bit freebsd binary compatiblty
Am Dienstag, 19. Februar 2008 15:08:12 schrieb Wojciech Puchar:
Can anyone tell how do we handle this situation???
Is there any way or i have to compile my code on 64 bit machine??
what's a problem to compile on 64-bit machine?
Ugh, there can be lots of problems, at least if the original programmers
weren't careful enough to avoid the many pitfalls of inter-architecture
development.
For example, in C, the long type is 32-bits wide on i386, and 64-bits wide on
amd64, whereas int is 32-bits wide on both.
Take the following code:
#include stdio.h
int main(int argc, char** argv)
{
int x;
unsigned long y = (unsigned long)x;
printf(%x\n,y);
return 0;
}
The formatting code %x expects an unsigned integer, but is given an unsigned
long (which is always big enough to fit an address, that's mandated by the C
standard, and so will contain the memory address of x). gcc only warns about
the non-matching format-string argument when run with -Wall.
On i386, this doesn't matter, as sizeof(int)==sizeof(long).
On amd64, this does matter, as printing a %x will only print the low-order
four bytes of the memory address, and not the upper four bytes, so that the
output string will no longer be unique for object x, depending on how the
virtual memory space is partitioned.
Now, I've seen quite a good deal of software who do stuff similar to this (at
least in spirit, by casting an address to an unsigned integer) to build
(hash) tables, and they all miserably fail when compiled on amd64, simply
because they presume that sizeof(int) == sizeof(long), which isn't true on
amd64 anymore.
If the OP's development team haven't taken care to avoid these pitfalls from
the start (which I guess they didn't, simply because they are only used to
developing on i386), they can be in for a real treat when trying to compile
_and run_ their application on amd64. I know I've had my fair share of
(re-)learning to do when initially compiling my (personal use) C++ programs
on amd64.
--
Heiko Wundram
Product Application Development
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Re: 32 bit and 64 bit freebsd binary compatiblty
a machine will be required (always) , i think i figured it out , ineed to compile them using *amd64 *instead of i386 . On 2/19/08, Wojciech Puchar [EMAIL PROTECTED] wrote: Can anyone tell how do we handle this situation??? Is there any way or i have to compile my code on 64 bit machine?? what's a problem to compile on 64-bit machine? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 32 bit and 64 bit freebsd binary compatiblty
Am Montag, den 18.02.2008, 20:42 +0530 schrieb navneet Upadhyay: it and 64 bit RHEL. We are porting the product to FreeBSD and when we tried the same, i.erunning binaries compiled on 32 bit FreeBSD 6.2 on 64 bit FreeBSD system they produce *core dump.* Any known reasons, do we have to compile binaries on 64 bit machine. Thanks, Do you have the lib32's installed ? bye Norman ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 32 bit and 64 bit freebsd binary compatiblty
navneet Upadhyay wrote: Hi , For our product we generally compile the binaries on 32 bit systems and use them for both 32 and 64 bit systems. like we have same binaries for 32 bit and 64 bit RHEL. We are porting the product to FreeBSD and when we tried the same, i.erunning binaries compiled on 32 bit FreeBSD 6.2 on 64 bit FreeBSD system they produce *core dump.* Any known reasons, do we have to compile binaries on 64 bit machine. This should not happen. I would blindly guess at a linking problem. Are you using any shared libraries that do not belong to the base system? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 32 bit and 64 bit freebsd binary compatiblty
I checked in usr/local/ and didnt find the lib32 folder, so i guess they are nt installed . Why do i need them ? can u put some light on it ? On 2/18/08, Norman Maurer [EMAIL PROTECTED] wrote: Am Montag, den 18.02.2008, 20:42 +0530 schrieb navneet Upadhyay: it and 64 bit RHEL. We are porting the product to FreeBSD and when we tried the same, i.erunning binaries compiled on 32 bit FreeBSD 6.2 on 64 bit FreeBSD system they produce *core dump.* Any known reasons, do we have to compile binaries on 64 bit machine. Thanks, Do you have the lib32's installed ? bye Norman ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 32 bit and 64 bit freebsd binary compatiblty
Yes i am using few libs not built on FreeBSD but they work fine on 32 bit freeBSD , so in principle they shud have the same behavior on 64 one. On 2/18/08, Dominic Fandrey [EMAIL PROTECTED] wrote: navneet Upadhyay wrote: Hi , For our product we generally compile the binaries on 32 bit systems and use them for both 32 and 64 bit systems. like we have same binaries for 32 bit and 64 bit RHEL. We are porting the product to FreeBSD and when we tried the same, i.erunning binaries compiled on 32 bit FreeBSD 6.2 on 64 bit FreeBSD system they produce *core dump.* Any known reasons, do we have to compile binaries on 64 bit machine. This should not happen. I would blindly guess at a linking problem. Are you using any shared libraries that do not belong to the base system? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 32 bit and 64 bit freebsd binary compatiblty
In response to navneet Upadhyay [EMAIL PROTECTED]: I checked in usr/local/ and didnt find the lib32 folder, so i guess they are nt installed . Why do i need them ? can u put some light on it ? I'm not sure of the details why you need them, but no ia32 program that I've seen runs properly on amd64 without. If you're running a release version, you can run sysinstall, then go to configuration - distributions and select to install. You can also build/install world and this should grab them by default. On 2/18/08, Norman Maurer [EMAIL PROTECTED] wrote: Am Montag, den 18.02.2008, 20:42 +0530 schrieb navneet Upadhyay: it and 64 bit RHEL. We are porting the product to FreeBSD and when we tried the same, i.erunning binaries compiled on 32 bit FreeBSD 6.2 on 64 bit FreeBSD system they produce *core dump.* Any known reasons, do we have to compile binaries on 64 bit machine. Thanks, Do you have the lib32's installed ? bye Norman ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] -- Bill Moran http://www.potentialtech.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 32 bit and 64 bit freebsd binary compatiblty
and use them for both 32 and 64 bit systems. like we have same binaries for 32 bit and 64 bit RHEL. We are porting the product to FreeBSD and when we tried the same, i.erunning binaries compiled on 32 bit FreeBSD 6.2 on 64 bit FreeBSD system they produce *core dump.* no idea. i use it but rarely, having no problems. consider adding extra logs (printfs, etc.) to get know when it crashes and fill a problem report Any known reasons, do we have to compile binaries on 64 bit machine. you should, as is it not a problem but performance is much better. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 32 bit and 64 bit freebsd binary compatiblty
navneet Upadhyay wrote: On 2/18/08, Dominic Fandrey [EMAIL PROTECTED] wrote: navneet Upadhyay wrote: Hi , For our product we generally compile the binaries on 32 bit systems and use them for both 32 and 64 bit systems. like we have same binaries for 32 bit and 64 bit RHEL. We are porting the product to FreeBSD and when we tried the same, i.erunning binaries compiled on 32 bit FreeBSD 6.2 on 64 bit FreeBSD system they produce *core dump.* Any known reasons, do we have to compile binaries on 64 bit machine. This should not happen. I would blindly guess at a linking problem. Are you using any shared libraries that do not belong to the base system? Yes i am using few libs not built on FreeBSD but they work fine on 32 bit freeBSD , so in principle they shud have the same behavior on 64 one. I suppose you are aware that they have to be 32-Bit libraries as well, for your 32-Bit application to work? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 32 bit and 64 bit freebsd binary compatiblty
I didnt get what do you mean. Do you mean : I should install lib32 on freeBSD and then rebuild my applications in order to make it work on 32 and 64 bit systems . rite now I have built my app on 32 bit system (which is not having lib32 installed), it works on 32 bit freebsd but fails on 64 bit system. On 2/18/08, Dominic Fandrey [EMAIL PROTECTED] wrote: navneet Upadhyay wrote: On 2/18/08, Dominic Fandrey [EMAIL PROTECTED] wrote: navneet Upadhyay wrote: Hi , For our product we generally compile the binaries on 32 bit systems and use them for both 32 and 64 bit systems. like we have same binaries for 32 bit and 64 bit RHEL. We are porting the product to FreeBSD and when we tried the same, i.erunning binaries compiled on 32 bit FreeBSD 6.2 on 64 bit FreeBSD system they produce *core dump.* Any known reasons, do we have to compile binaries on 64 bit machine. This should not happen. I would blindly guess at a linking problem. Are you using any shared libraries that do not belong to the base system? Yes i am using few libs not built on FreeBSD but they work fine on 32 bit freeBSD , so in principle they shud have the same behavior on 64 one. I suppose you are aware that they have to be 32-Bit libraries as well, for your 32-Bit application to work? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 32 bit and 64 bit freebsd binary compatiblty
navneet Upadhyay wrote: On 2/18/08, Dominic Fandrey [EMAIL PROTECTED] wrote: navneet Upadhyay wrote: On 2/18/08, Dominic Fandrey [EMAIL PROTECTED] wrote: navneet Upadhyay wrote: Hi , For our product we generally compile the binaries on 32 bit systems and use them for both 32 and 64 bit systems. like we have same binaries for 32 bit and 64 bit RHEL. We are porting the product to FreeBSD and when we tried the same, i.erunning binaries compiled on 32 bit FreeBSD 6.2 on 64 bit FreeBSD system they produce *core dump.* Any known reasons, do we have to compile binaries on 64 bit machine. This should not happen. I would blindly guess at a linking problem. Are you using any shared libraries that do not belong to the base system? Yes i am using few libs not built on FreeBSD but they work fine on 32 bit freeBSD , so in principle they shud have the same behavior on 64 one. I suppose you are aware that they have to be 32-Bit libraries as well, for your 32-Bit application to work? I didnt get what do you mean. Do you mean : I should install lib32 on freeBSD and then rebuild my applications in order to make it work on 32 and 64 bit systems . rite now I have built my app on 32 bit system (which is not having lib32 installed), it works on 32 bit freebsd but fails on 64 bit system. The app needs 32-Bit libraries tu run on 64 Bit. I suggest you link your program statically against libraries that are not part of the base system. That way everything should run just fine. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
